Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual o oponente que levou a um recorde de 10-6?
 ###Tabelas: CREATE TABLE mixed_martial_arts_record (mixed_martial_arts_record_id AUTO_INCREMENT PRIMARY KEY, Res. VARCHAR, Record VARCHAR, Opponent VARCHAR, Method VARCHAR, Event VARCHAR, Round INT, Time VARCHAR, Location VARCHAR) CREATE TABLE main_countries_and_territories_data (main_countries_and_territories_data_id AUTO_INCREMENT PRIMARY KEY, Country / territory VARCHAR, Area (km²) INT, Population INT, Pop. density (/km²) INT, GDP millions of USD (2009) INT, GDP per capita USD (2009-2011) INT, Capital VARCHAR) CREATE TABLE girls_league_championships (girls_league_championships_id AUTO_INCREMENT PRIMARY KEY, School Year VARCHAR, Volleyball VARCHAR, Cross Country VARCHAR, Soccer VARCHAR, Tennis VARCHAR, Golf VARCHAR) CREATE TABLE number_of_championships_by_school (number_of_championships_by_school_id AUTO_INCREMENT PRIMARY KEY, University VARCHAR, Men's INT, Women's INT, Runner-up INT, Total Championships INT) CREATE TABLE regions (regions_id AUTO_INCREMENT PRIMARY KEY, In English VARCHAR, In Finnish VARCHAR, In Swedish VARCHAR, Capital VARCHAR, Regional state administrative agency VARCHAR)  
SELECT Opponent FROM mixed_martial_arts_record WHERE Record = 10-6